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  1. Hive
  2. HIVE-25615

Hive on tez will generate at least one MapContainer per 0 length file

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      When tez read a table with many partitions and those partitions contain 0 length file only, ColumnarSplitSizeEstimator will return Integer.MAX_VALUE bytes length for every 0 length file.Then,TezSplitGrouper will treat those files as big files,and generate at least one MapContainer per 0 file to handle it.This is incorrect and even wasteful.

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            Unassigned Unassigned
            yanvcl JackYan
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